Short answer: Notable HVAC contractors St. Louis homeowners turn to in 2026 include Design Aire Heating & Cooling (family-owned since 1904), Welsch Heating & Cooling (since 1895), Seliga Heating & Cooling (since 1927), Vogel Heating & Cooling (since 1946) and Galmiche & Sons (since 1950).
Every company below serves the St. Louis metro, and every fact comes from the company’s own website or a published profile. We left out ratings, prices and claims we couldn’t verify.
HVAC contractors St. Louis: at a glance
| Rank | Company | Since | Best for | Location |
|---|---|---|---|---|
| 1 | Design Aire Heating & Cooling | 1904 | Homeowners who want a four-generation family company with service plans | Maryland Heights, South City, O’Fallon |
| 2 | Welsch Heating & Cooling | 1895 | Residential and commercial service across the metro | St. Louis (63146) |
| 3 | Seliga Heating & Cooling | 1927 | Custom ductwork from an in-house sheet metal shop | Gravois Rd., South St. Louis |
| 4 | Vogel Heating & Cooling | 1946 | South County / Fenton-area homes and businesses | Fenton |
| 5 | Galmiche & Sons | 1950 | Family-owned residential and commercial HVAC | Chaffee Dr., St. Louis (63146) |
| 6 | Jerry Kelly Heating, Air Conditioning, Plumbing & Electrical | 1977 | St. Charles County homeowners | St. Peters |
| 7 | Hoffmann Brothers | 1988 | One company for HVAC, plumbing, electrical and appliances | Multiple metro offices |
| 8 | R.F. Meeh | 1910 | Commercial mechanical, sheet metal and HVAC work | St. Louis |
1. Design Aire Heating & Cooling
Frank “Pappy” Fischer started the business in 1904 as a hot water and steam heating company working out of his South St. Louis home. Today it’s run by members of the Goldkamp family, and the company says it has installed or serviced heating and cooling for more than 100,000 homes in St. Louis, St. Charles and the surrounding area. Design Aire says its technicians average more than 26 years of experience and are background-checked and drug-tested. It services furnaces, air conditioners, boilers, heat pumps, ductless mini-splits and geothermal systems, and offers planned maintenance agreements.
Offices: 2550 Harley Dr., Maryland Heights; 5804 Hampton Ave., St. Louis; 103 Church St., O’Fallon. Phone (314) 739-1600. Visit Design Aire
2. Welsch Heating & Cooling
Founded in 1895 by Adam Welsch and still owned by the Welsch family, the company spent more than 75 years on Manchester Road before moving near I-270 and Page Avenue in 1970. It offers 24/7 service on all brands for residential and commercial customers. 2175 Welsch Industrial Ct., St. Louis, MO 63146. Welsch Heating & Cooling
3. Seliga Heating & Cooling
A fourth-generation family business serving St. Louis since 1927, Seliga handles residential and commercial sales, service and installation, and runs its own sheet metal shop for custom ductwork. 6211 Gravois Rd., St. Louis, MO 63116. Seliga Heating & Cooling
4. Vogel Heating & Cooling
Family-owned and serving St. Louis since 1946, Vogel provides HVAC repair, maintenance and installation for homes and businesses. 1642 Manufacturers Dr., Fenton, MO 63026. Vogel Heating & Cooling
5. Galmiche & Sons
Galmiche & Sons began as a gutter installation company in 1950 and grew into a family-owned residential and commercial heating and cooling provider. 2280 Chaffee Dr., St. Louis, MO 63146. Galmiche & Sons
6. Jerry Kelly Heating, Air Conditioning, Plumbing & Electrical
Jerry and Janet Kelly opened the company in 1977 in St. Charles’s Frenchtown district. It now offers heating, cooling, plumbing, drain and electrical service from St. Peters. 4631 N. St. Peters Pkwy., St. Peters, MO 63304. Jerry Kelly
7. Hoffmann Brothers
Robert Hoffmann, a former mechanical engineer at Anheuser-Busch, founded Hoffmann Brothers in 1988 with four employees. It’s now run by his sons Chris and Joe and covers HVAC, plumbing, electrical and appliance repair in St. Louis and Nashville. Hoffmann Brothers
8. R.F. Meeh
Family-owned since 1910, R.F. Meeh is a mechanical, sheet metal and HVAC contractor focused mainly on commercial projects. R.F. Meeh
How to choose an HVAC contractor in St. Louis
- Make sure the company services your system type (furnace, heat pump, boiler, geothermal or ductless).
- Ask whether it offers maintenance plans and after-hours service.
- Get written estimates that list equipment model numbers and efficiency ratings.
- Check that the company covers your part of the metro (St. Louis County, St. Charles County or the Metro East).
- Ask about utility rebates and financing before you sign.
